nsz Git - musl/blob - arch/arm/reloc.h

   1 #include <string.h>
   2 #include <elf.h>
   3 #include <endian.h>
   4
   5 #if __BYTE_ORDER == __BIG_ENDIAN
   6 #define ENDIAN_SUFFIX "eb"
   7 #else
   8 #define ENDIAN_SUFFIX ""
   9 #endif
  10
  11 #if __SOFTFP__
  12 #define FP_SUFFIX ""
  13 #else
  14 #define FP_SUFFIX "hf"
  15 #endif
  16
  17 #define LDSO_ARCH "arm" ENDIAN_SUFFIX FP_SUFFIX
  18
  19 #define IS_COPY(x) ((x)==R_ARM_COPY)
  20 #define IS_PLT(x) ((x)==R_ARM_JUMP_SLOT)
  21
  22 static inline void do_single_reloc(
  23         struct dso *self, unsigned char *base_addr,
  24         size_t *reloc_addr, int type, size_t addend,
  25         Sym *sym, size_t sym_size,
  26         struct symdef def, size_t sym_val)
  27 {
  28         switch(type) {
  29         case R_ARM_ABS32:
  30                 *reloc_addr += sym_val;
  31                 break;
  32         case R_ARM_GLOB_DAT:
  33         case R_ARM_JUMP_SLOT:
  34                 *reloc_addr = sym_val;
  35                 break;
  36         case R_ARM_RELATIVE:
  37                 *reloc_addr += (size_t)base_addr;
  38                 break;
  39         case R_ARM_COPY:
  40                 memcpy(reloc_addr, (void *)sym_val, sym_size);
  41                 break;
  42         case R_ARM_TLS_DTPMOD32:
  43                 *reloc_addr = def.dso ? def.dso->tls_id : self->tls_id;
  44                 break;
  45         case R_ARM_TLS_DTPOFF32:
  46                 *reloc_addr += def.sym->st_value;
  47                 break;
  48         case R_ARM_TLS_TPOFF32:
  49                 *reloc_addr += def.sym
  50                         ? def.sym->st_value + def.dso->tls_offset + 8
  51                         : self->tls_offset + 8;
  52                 break;
  53         }
  54 }